OLYMPICS Gymnastics -- Baltimore has been chosen as the site for 1992 U.S. Olympic trials, state officials said. Baltimore was chosen over Columbus, Ohio, and Memphis. The trials will be held June 6-14 at the Baltimore Arena. Sixty gymnasts are expected to participate and the event is expected to bring about $5 million into the city.

HOCKEY New York Rangers -- NHL suspended D Mark Hardy for five games for stick-swinging incident Friday against Winnipeg.Buffalo Sabres -- Signed RW Jiri Sejba after Czechoslovakian hockey federation released his rights. In five games with Buffalo's Rochester farm team this season, the 28-year-old player had three goals and three assists. In 101 games over previous four seasons with Pardubice of Czechoslovakian league, he had 82 goals and 61 assists. St. Louis Blues -- Recalled C Nelson Emerson from Peoria of IHL and sent C Michel Mongeau, G Guy Hebert to Peoria. Boston Bruins -- Sent C John Byce and D Bob Beers to Maine of AHL. Vancouver Canucks -- Recalled F Gino Odjick.

BASEBALL Minnesota Twins -- Johnny Ard, team's top draft choice in 1988, and OF J.T. Bruett, were added to roster.

COLLEGES George Mason -- Jemel Buck, 6-foot-6 forward from Solebury High School of New Hope, Pa., signed letter-of-intent. Last season, he averaged 11 points, 12 rebounds and 3 blocks as team went 17-7. Nebraska -- Derrick Chandler, 6-10 F from Washington, D.C., and Alvin (Tex.) Community College, signed letter-of-intent, Alvin Coach Gary Coffman said. Oregon State -- Dave Kragthorpe resigned as football coach. His 1990 team was 1-10 and his overall record with Beavers was 17-48-2. Brigham Young -- LaVell Edwards was named Western Athletic Conference football coach of year by vote of league's head coaches and sports information directors. Texas Tech -- Football coach Spike Dykes, who suffered his worst season this year at 4-7, was given 10-year contract extension reportedly worth more than $1 million. He is 24-21-1 in four years with the Red Raiders.